Type-writing machine.



P ATBNTED DEC. 29, 1903.

C. GABRIELSON. TYPE WRITING MACHINE.

APPLICATION FILED AUG. 8, 1902.

N0 MODEL.

UNITED STATE-SN Patented December 29, 1903.

PATIENT OFFICE.

CARL GABRIELSON, OF- SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TOr UNIONTYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEWJERSEY.

TYPE-WRITING MAcHlNE.

SPECIFICATION fOrmng part of Letters Patent No. 748,062, dated December29, 1903- Application led August 8, 1902.

To aZZ whom it may concern:

Be it known that I, CARL GABRIELsoma citizen of the United States, and aresident of Springeld, in the county of Hampden and State ofMassachusetts,have inventedcertain new and useful Improvements inType-Writin g Machines,of which the followingis aspeci flcation.

My present invention relates to spring-ref storing means for escapementor feed-dog rockers or carriers of type-writing machines; and the objectof my invention is to provide simple, cheap, and efficient means of thecharacter described which can be readily adjusted to vary the tension ofthe spring and which is not-liable to become deranged or broken.

To the above and other ends which will hereinafter appear my inventionconsists in the novel features of construction, arrangements of parts,and combinations of elements to be hereinafter described and claimed.

In the accompanying drawings,wherein like reference charactersindicatelike parts in the various views, Figure 1 is a central front-torearsectional view of suiiicient number of parts of one form of type-Writingmachine to illustrate my invention in its application thereto. tionalview of the same, taken in the ,rear of the escapement or dog rocker andlooking toward the front of the machine. Eig is a detail side View ofthe adjusting-plug. Eig. 4 is an end view of the same looking in thedirection of the arrow in Fig. 3.

The top plate 1 of the machine is provided with a depending bracket 2,secured thereto in any suitable manner. This bracket is provided Withrearwardly-extending lugs 3, which are tapped to receive bearing-screws4., that extend through the lugs and are coned at their inner ends 5,Where they constitute bearings for the rock-shaft 6 of the feed-dog orescapement rocker. The screws 4 may each be provided with a lock-nut 7to prevent au accidental displacement thereof. The rock-shaft 6constitutes a 4part of the escape-` ment or dog rocker and has anupwardly-extending arm 8 projecting therefrom, which carries the usualfeed and detent dogs 9 and ment-wheel 11.

Fig. 2 is a vertical transverse sec- Serial No. 118,874. (No model.)

10, respectively, that coperate with a suitable escapement element, suchas the escape- 12 extending therethrough from front to rear for thereception of a screw-driver or other tool for purposes which willhereinafter more clearly appear. The forward portion of the rocker-armis recessed at 13 for the reception of one end of a coiledcompression-spring 14. The walls of the recess 13 are preferablysloping, so that the spring will not bind against them during theoscillation of the rocker. From an examination of Fig. 1 it will be seenthat the recess 13 is alined with the screw- `constitutes an abutmentfor the spring. The

bottom wall19 of the plug is provided with a "nick 20, that receives ascrew-driver and by means of which the plug may be turned to adjust iton its threaded connection in the direction of the length ofthe spring.It will.

`be .observed that the coiled compressionspring extends longitudinallybetween the seat or recess 13 in the dog-rocker and the adjustableplug,which constitutes a relatively fixed abutment therefor, and thatthe tension of the spring holds it seated in the recess 13 and plug, andthus maintains it connected to the escapement-rocker and relativelyfixed part. The opening l2 is so situated that it is alined with thecentral opening in the coiled spring, and the nick 20in theplug islikewise alinedrwith the openings in the spring and rocker, so that ascrew-driver may be introduced from therearof the machine throughtheopening 12 and through the central opening in lthe spring and engagein the nick 20 of the plug in order to turn the plug,

The arm 8 has an opening and thus adjust the tension of the spring 14.`Extending forwardly from the rocker is an arm 21, which is pivotallyconnected at its forward end 22 to a depending link 23, that isoperatively connected to the universal bar (not shown) in any suitablemanner, so that a downward movement of the link 23 will cause thefeed-dogs to be moved in the direction of the arrow in Fig. 1 or towardthe front of the machine to compress the coiled spring 14, and whenpressure on the finger-key is released the spring 14 will restore therocker to its initial position. (Represented in Fig. 1.)

It will be seen that the pressure of the spring on the recessed plug orabutment 16 is exerted against the threads thereof and that thispressure tends to hold the plug in its adjusted position rather than todisplace it therefrom during the actuation of the machine.

By splitting the plug 16 in the manner shown a spring pressure orvresiliency thereof is afforded which tends to bind and hold theadjustable plug in any position to which it may be turned in itsthreaded bearing.

`1\Totwithstanding the fact that the means for affording an adjustmentof the spring tension for the rocker is situated forwardly of the rockerit may be readily adjusted from the rear of the machine, where it isfree from obstruction, by introducing a screwdriver or other suitabletool through the opening 12 and engaging it with the plug, thusaffording easy access to the tension-adjusting device. Furthermore, thespring and adjusting devices are housed and are so located that they areamply protected against accidental derangement or injury. At the sametime it will be noted the construction is such that the operator withouta suitable tool is unable to adjust the tension of the feed-rocker orcarrier-spring, which is a desideratum since much trouble and annoyancefrequently result from the attempts of operators lacking the necessarymechanical skill to adjust the dog-carrier spring, which ordinarily isarranged for convenient adjustment by a permanently-placed thumb-piece.

While I have shown my invention applied to a feed-dog rocker of thegeneral character employed in the No. 6 Remington machine, it should beunderstood that it is immaterial from certain aspects of my inventionwhat character of escapement carrier or rocker or` what character oftype-writing machine the spring restoring device is applied to orwhether the carrier or rocker is employed to move the feed dogs or afeed rack transversely to effect a letter-space feed of the carriage.

While I have referred to the device which carries the feed-dogs 9 and 10as a rocker, it should be understood that this term is used in a genericsense and is intended to cover any reciprocating carrier for anescapement element which moves to and fro during the letter-spacingoperations of the machine (whether or not said carrier be pivoted to itssupport) excepting where the rocker is specifically referred to in theclaims as a pivoted one.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a type-writing machine, the combination with an escapementrocker,of a relatively xed abutment, a coiled compressionspring disposedlongitudinally between said rocker and abutment, and means for adjustingthe tension of said spring.

2. In a type-writing machine, the combination with an escapement-rocker,a relatively xed adjustable abutment, and a compression-springinterposed between said escapement-rocker and adjustable abutment andseated in the rocker at one end and in the abutment at the other.

3. In a type-writing machine, the combination with an escapement-rockerhaving a seat or recess therein, a relatively xed adjustable threadedabutment having a seat or recess therein, and a coiledcompression-springinterposed between said escapement-rocker and theadjustable abutment and seated in the recess of the rocker at one endand in the recess of the abutment at the other.

4. In a type-writing machine, the combination with an escapement-rockerhaving a tool-receiving opening therein, an adjustable abutment fixedrelatively of the rocker, and

provided with means adapted to be engaged by a tool to eect anadjustment of said abutment, and a coiled spring which bears at one endagainst the rocker and at the other end against the abutment, Wherebyatool may be inserted through the said opening in the rocker to adjustthe abutment and thus vary the tension of the spring.

5. In a type-writing machine, the combination with an escapementrockerhaving a screw-driver-receiving opening therein, an adjustable threadedplug fixed relatively of the rocker and'forward thereof and providedwith a nick adapted to be engaged by a screwdriver to effect anadjustment of said plug, and a coiled compression-spring which bears atone end against the rocker and at the other end against the abutment,whereby a screw-driver may be inserted through the said opening in therocker to adjust the plug and thus vary the tension of the spring.

6. In atype-writing machine, the combination of a fixed bracket, anescapement-rocker pivoted to said bracket, a threaded plug seated in athreaded opening in the bracket forward of the rocker, a coiledcompressionspring interposed between the plug and the rocker, and meansfor affording an adjustment of the plug to vary the tension of thespring.

7. In a type-writing machine, the combination of an escapement-rockerhaving a toolreceiving opening therein, an adjustable relatively xedabutment, a coiled spring interposed between the adjustable abutment andICO IIC)

the rocker, and having the opening therein alned with the tool-receivingopening in the abutment, and means adapted to be engaged by a tool wheninserted through said opening for aording an adjustmentof the abutment.

8. In a type-writing machine, the combination of a fixed bracket, anescapement-rocker pivoted to said bracket and having a tool receivingopening therein, a threaded plug seated in a threaded opening in thebracket forward of the rocker, a coiled compressionspring interposedbetween the plug and the rocker, the opening in the spring being alinedwith `the tool-receiving opening in the rocker, and engaging means onthe plug to coperate with a tool inserted through the openings in therocker and spring.

9. In a type-writing machine, the combination of a fixed bracket, anescapement-rocker pivoted to said bracket and having a springreceivingrecess or pocket and a screw-driverreceiving opening therein, a threadedrecessed plug that is received in a threaded opening in the bracketforward of the rocker and which has a screw-driver nick in the recessedportion thereof, and a coiled spring that is seated at one end in therecess in the rocker and at the other end in the recessrin the plug,said recesses and openings in the rocker and spring being alined,whereby a screw-driver may be inserted through the openings in therocker and spring and the plug may be adjusted to vary the tension ofthe spring.

l0. In a type-writing machine, the combination of an escapement-rocker,acoiled compression-spring for restoring said rocker to its normalposition, and a longitudinally-adjustable plug that bears on one end ofsaid spring and is adapted to adjust the tension thereof.

11. In a type-writing machine, the combination of an escapement-rocker,a coiled compression-spring which extends longitudinally between therocker and a relatively ixed bearing-point, and a threaded plug which isadjustable in the direction of the length ofV the spring and bears onone end thereof to vary the tension.

12. In a typewriting machine, the combination of an escapementrocker, acoiled compression-sprin g which extends longitudinally between therocker and a relatively fixed bearing-point, and a recessed threaded1ongitudinally-split plug in which one end of the spring is seated andwhich is adjustable in the direction of the length of the spring to varythe tension thereof.

13. In a type-writing machine, the combination of a reciprocating membercarrying `one of the escapement devices, an abutment,

a coiled compression-spring arranged longitudinally between saidreciprocating member and said abutment, and means for adjusting thetension of said spring.

14. In a type-writing machine, the combi nation of an escapement-rocker,a relatively fixed bearing, a removable coiled compression-springinterposed and extending longitudinally between said rocker and saidrelatively tixed bearing, means for preventing a displacement of thespring from said rocker and from-said bearing, and adjustable meansassociated with one end of the spring for affording an expansion orcontraction of the spring to vary the tension thereof.

15. In a type-writing machine, the combination of an escapement-rocker,a relatively fixed bearing, a coiled compression-spring interposed andextending longitudinally between said rocker and said relatively fixedbearing, means for connecting one end of the spring to the rocker andthe other to said relatively fixed means, the tension of the springmaintaining the spring connected to said parts, and means for adjustingthe tension of said spring.

Signed at Springfield, in the county of Hampden and State ofMassachusetts, this 6th day of August, A. D. 1902.

CARL GABRIELSON.

Witnesses:

J. G. DUN-NING, C. S. HAwKINs.

